2 ms·

This may have been what you're thinking of. Sadly I lack a source; it's just been kicking around my miscellaneous images folder. http://i.imgur.com/tBgQkxi.jpg

• friendcomputer 13y ago
  That's from http://arxiv.org/pdf/gr-qc/9704009.pdf http://arxiv.org/pdf/gr-qc/9704009.pdf There's some more from the author here: http://space.mit.edu/home/tegmark/crazy.html http://space.mit.edu/home/tegmark/crazy.html
  • GuiA 13y ago
    Thank you! I love the internet :)
• igravious 13y ago
  That's it! Thanks!
• pohl 13y ago
  So where would categories hang on that graph? Below semigroups?